[MDEV-33354] Corruption of indexes on generated virtual column(s) on an optimistic parallel replica - Jira

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Type: Bug
Status: Closed (View Workflow)
Priority: Major
Resolution: Duplicate
Affects Version/s: 10.6.14, 10.6.15, 10.6.16, 10.6.17
Fix Version/s: N/A
Component/s: Replication, Storage Engine - InnoDB, Virtual Columns
Labels:
None

Description

Set up a replication, for example, like between this two instances on the same box:

openxs@ao756:~/dbs/maria10.6$ ps aux | grep maria

openxs   1831742  8.7  2.9 1546012 111544 ?      Sl   січ31 100:46 /home/openxs/dbs/maria10.6/bin/mariadbd --no-defaults --basedir=/home/openxs/dbs/maria10.6 --datadir=/home/openxs/node1 --plugin-dir=/home/openxs/dbs/maria10.6/lib/plugin --log-bin --binlog_format=row --server_id=1 --log-error=/home/openxs/node1/ao756.err --pid-file=ao756.pid --socket=/tmp/node1.sock --port=3306

openxs   1926056 41.0  2.8 1539216 109840 pts/2  Sl   10:55  56:25 /home/openxs/dbs/maria10.6/bin/mariadbd --no-defaults --basedir=/home/openxs/dbs/maria10.6 --datadir=/home/openxs/node2 --plugin-dir=/home/openxs/dbs/maria10.6/lib/plugin --log-bin --server_id=2 --slave_parallel_threads=4 --slave_parallel_max_queued=512KB --log-error=/home/openxs/node2/ao756.err --pid-file=ao756.pid --socket=/tmp/node2.sock --port=3307

Note that slave_parallel_threads should be > 1, larger slave_parallel_max_queued value than default also seems to help to hit the problem faster.

Then, on a primary node create this table and insert a single row in it:

openxs@ao756:~/dbs/maria10.6$ bin/mysql --socket=/tmp/node1.sock test

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Welcome to the MariaDB monitor.  Commands end with ; or \g.

Your MariaDB connection id is 108187

Server version: 10.6.17-MariaDB-log Source distribution

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [test]> select @@binlog_format;

+-----------------+

| @@binlog_format |

+-----------------+

| ROW             |

+-----------------+

1 row in set (0,000 sec)

MariaDB [test]> show create table tts\G

*************************** 1. row ***************************

       Table: tts

Create Table: CREATE TABLE `tts` (

  `id` int(11) NOT NULL,

  `value` longtext NOT NULL CHECK (json_valid(`value`)),

  `ts` bigint(20) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.creationTS')),'null')) VIRTUAL,

  `dt` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.executionDate')),'null')) VIRTUAL,

  `c1` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c1')),'null')) VIRTUAL,

  `c2` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c2')),'null')) VIRTUAL,

  `c3` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c3')),'null')) VIRTUAL,

  `c4` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c4')),'null')) VIRTUAL,

  `c5` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c5')),'null')) VIRTUAL,

  `c6` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c6')),'null')) VIRTUAL,

  `c7` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c7')),'null')) VIRTUAL,

  `c8` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c8')),'null')) VIRTUAL,

  `c9` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c9')),'null')) VIRTUAL,

  `c10` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c10')),'null')) VIRTUAL,

  `c12` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c11')),'null')) VIRTUAL,

  `c11` varchar(15) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c12')),'null')) VIRTUAL,

  `c0` varchar(150) GENERATED ALWAYS AS (nullif(json_unquote(json_extract(`value`,'$.c0')),'null')) VIRTUAL,

  PRIMARY KEY (`id`),

  KEY `ix_ts` (`ts`),

  KEY `ix_dt` (`dt`),

  KEY `c1` (`c1`),

  KEY `c2` (`c2`),

  KEY `c3` (`c3`),

  KEY `c4` (`c4`),

  KEY `c5` (`c5`),

  KEY `c6` (`c6`),

  KEY `c7` (`c7`),

  KEY `c8` (`c8`),

  KEY `c9` (`c9`),

  KEY `c10` (`c10`),

  KEY `c11` (`c11`),

  KEY `c12` (`c12`),

  KEY `ix_c1_ts` (`c1`,`ts`),

  KEY `ix_c1_c2` (`c1`,`c2`),

  KEY `ix_c1_c3` (`c1`,`c3`),

  KEY `ix_c3_dt` (`c3`,`dt`),

  KEY `ix_ts_c1` (`ts`,`c1`)

) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci

1 row in set (0,000 sec)

MariaDB [test]> insert into tts (`id`, `value`) values (0, concat('{\"creationTS\":1613655148058,\"executionDate\":1613655115666,\"c1\":\"value1\",\"c2\":1613655148058,\"c3\":"\long value\",\"c4\":1613655115666,\"c5\":123456,\"c6\":1234567,\"c7\":7777777,\"c8\":888888888,"\c9\":99999,"\c10\":\"111111111\","\c11\":111111,"\c12\":1212121212,"\c0\":\"0000000000000000000000000000000000000000000000000000000000000000000000000000011111111111111111111111111111111111111111111111111110000000\",\"data\":', concat(repeat(2,100400), '}')));

Query OK, 1 row affected (0,274 sec)

MariaDB [test]> select id, ts, dt, c2, c4 from tts;

+----+---------------+---------------+---------------+---------------+

| id | ts            | dt            | c2            | c4            |

+----+---------------+---------------+---------------+---------------+

|  0 | 1613655148058 | 1613655115666 | 1613655148058 | 1613655115666 |

+----+---------------+---------------+---------------+---------------+

1 row in set (0,013 sec)

MariaDB [test]> show table status like 'tts'\G

*************************** 1. row ***************************

            Name: tts

          Engine: InnoDB

         Version: 11

      Row_format: Dynamic

            Rows: 1

  Avg_row_length: 16384

     Data_length: 16384

 Max_data_length: 0

    Index_length: 311296

       Data_free: 0

  Auto_increment: NULL

     Create_time: 2024-02-01 11:58:04

     Update_time: 2024-02-01 12:32:00

      Check_time: NULL

       Collation: latin1_swedish_ci

        Checksum: NULL

  Create_options:

         Comment:

Max_index_length: 0

       Temporary: N

1 row in set (0,001 sec)

The create a shell script that will update the row twice at each step, like this:

openxs@ao756:~/dbs/maria10.6$ cat ~/tts.sh

#!/bin/bash

currentTimeMillis_OLD_VALUE=1613655115666

executionDate_OLD_VALUE=1613655148058

while [ true ]

do

if [[ -f /tmp/touch.go ]]; then

  echo "Gracefully stopping"

  exit

else

currentTimeMillis_NEW_VALUE=$((currentTimeMillis_OLD_VALUE+1))

executionDate_NEW_VALUE=$((executionDate_OLD_VALUE+1))

echo "UPDATE tts SET value = REGEXP_REPLACE(value, '\":${currentTimeMillis_OLD_VALUE}','\":${currentTimeMillis_NEW_VALUE}');" > /tmp/tmp.sql

echo "UPDATE tts SET value = REGEXP_REPLACE(value, '\":${executionDate_OLD_VALUE}','\":${executionDate_NEW_VALUE}');" >> /tmp/tmp.sql

bin/mysql --socket=/tmp/node1.sock test <<EOF

source /tmp/tmp.sql;

EOF

currentTimeMillis_OLD_VALUE=$((currentTimeMillis_OLD_VALUE+1))

executionDate_OLD_VALUE=$((executionDate_OLD_VALUE+1))

fi

done

Run the script (that do UPDATEs on primary) for some time, depending on the hardware:

openxs@ao756:~/dbs/maria10.6$ /bin/bash ~/tts.sh

Note that it is single threaded. Eventually (I had to wait for dozens of minutes), it fails and replication stops:

openxs@ao756:~/dbs/maria10.6$ bin/mysql --socket=/tmp/node2.sock test

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Welcome to the MariaDB monitor.  Commands end with ; or \g.

Your MariaDB connection id is 1544

Server version: 10.6.17-MariaDB-log Source distribution

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [test]> show slave status\G

*************************** 1. row ***************************

                Slave_IO_State: Waiting for master to send event

                   Master_Host: 192.168.1.19

                   Master_User: repl

                   Master_Port: 3306

                 Connect_Retry: 60

               Master_Log_File: ao756-bin.000004

           Read_Master_Log_Pos: 108315415

                Relay_Log_File: ao756-relay-bin.000005

                 Relay_Log_Pos: 401673374

         Relay_Master_Log_File: ao756-bin.000002

              Slave_IO_Running: Yes

             Slave_SQL_Running: No

               Replicate_Do_DB:

           Replicate_Ignore_DB:

            Replicate_Do_Table:

        Replicate_Ignore_Table:

       Replicate_Wild_Do_Table:

   Replicate_Wild_Ignore_Table:

                    Last_Errno: 1034

                    Last_Error: Could not execute Update_rows_v1 event on table test.tts; Index for table 'tts' is corrupt; try to repair it, Error_code: 1034; handler error HA_ERR_CRASHED; the event's master log ao756-bin.000002, end_log_pos 402081942

                  Skip_Counter: 0

           Exec_Master_Log_Pos: 401879515

               Relay_Log_Space: 3323547850

               Until_Condition: None

                Until_Log_File:

                 Until_Log_Pos: 0

            Master_SSL_Allowed: No

            Master_SSL_CA_File:

            Master_SSL_CA_Path:

               Master_SSL_Cert:

             Master_SSL_Cipher:

                Master_SSL_Key:

         Seconds_Behind_Master: NULL

 Master_SSL_Verify_Server_Cert: No

                 Last_IO_Errno: 0

                 Last_IO_Error:

                Last_SQL_Errno: 1034

                Last_SQL_Error: Could not execute Update_rows_v1 event on table test.tts; Index for table 'tts' is corrupt; try to repair it, Error_code: 1034; handler error HA_ERR_CRASHED; the event's master log ao756-bin.000002, end_log_pos 402081942

   Replicate_Ignore_Server_Ids:

              Master_Server_Id: 1

                Master_SSL_Crl:

            Master_SSL_Crlpath:

                    Using_Gtid: No

                   Gtid_IO_Pos:

       Replicate_Do_Domain_Ids:

   Replicate_Ignore_Domain_Ids:

                 Parallel_Mode: optimistic

                     SQL_Delay: 0

           SQL_Remaining_Delay: NULL

       Slave_SQL_Running_State:

              Slave_DDL_Groups: 4

Slave_Non_Transactional_Groups: 0

    Slave_Transactional_Groups: 90128

1 row in set (0,050 sec)

In the error log of replica we see the following (note that it took me 30+ minutes of wait until the problem happened):

...

2024-02-01 11:59:24 764 [Note] Slave I/O thread: Start asynchronous replication to master 'repl@192.168.1.19:3306' in log 'ao756-bin.000001' at position 328

2024-02-01 11:59:24 764 [Note] Slave I/O thread: connected to master 'repl@192.168.1.19:3306',replication started in log 'ao756-bin.000001' at position 328

2024-02-01 11:59:24 765 [Note] Slave SQL thread initialized, starting replication in log 'ao756-bin.000001' at position 328, relay log './ao756-relay-bin.000001' position: 4

2024-02-01 12:32:48 765 [Note] Error reading relay log event: slave SQL thread was killed

2024-02-01 12:32:48 765 [Note] Slave SQL thread exiting, replication stopped in log 'ao756-bin.000001' at position 4649744, master: 192.168.1.19:3306

2024-02-01 12:32:48 764 [Note] Slave I/O thread exiting, read up to log 'ao756-bin.000001', position 4649744, master 192.168.1.19:3306

2024-02-01 12:32:52 1117 [Note] Slave I/O thread: Start asynchronous replication to master 'repl@192.168.1.19:3306' in log 'ao756-bin.000001' at position 4649744

2024-02-01 12:32:52 1117 [Note] Slave I/O thread: connected to master 'repl@192.168.1.19:3306',replication started in log 'ao756-bin.000001' at position 4649744

2024-02-01 12:32:52 1118 [Note] Slave SQL thread initialized, starting replication in log 'ao756-bin.000001' at position 4649744, relay log './ao756-relay-bin.000002' position: 4649971

2024-02-01 13:04:49 1120 [ERROR] InnoDB: We detected index corruption in an InnoDB type table. You have to dump + drop + reimport the table or, in a case of widespread corruption, dump all InnoDB tables and recreate the whole tablespace. If the mariadbd server crashes after the startup or when you dump the tables. Please refer to https://mariadb.com/kb/en/library/innodb-recovery-modes/ for information about forcing recovery.

2024-02-01 13:04:49 1120 [ERROR] mariadbd: Index for table 'tts' is corrupt; try to repair it

2024-02-01 13:04:49 1120 [ERROR] InnoDB: We detected index corruption in an InnoDB type table. You have to dump + drop + reimport the table or, in a case of widespread corruption, dump all InnoDB tables and recreate the whole tablespace. If the mariadbd server crashes after the startup or when you dump the tables. Please refer to https://mariadb.com/kb/en/library/innodb-recovery-modes/ for information about forcing recovery.

2024-02-01 13:04:49 1120 [ERROR] mariadbd: Index for table 'tts' is corrupt; try to repair it

2024-02-01 13:04:49 1120 [ERROR] Slave SQL: Could not execute Update_rows_v1 event on table test.tts; Index for table 'tts' is corrupt; try to repair it, Error_code: 1034; handler error HA_ERR_CRASHED; the event's master log ao756-bin.000002, end_log_pos 402081942, Gtid 0-1-45135, Internal MariaDB error code: 1034

2024-02-01 13:04:49 1120 [Warning] Slave: Index for table 'tts' is corrupt; try to repair it Error_code: 1034

2024-02-01 13:04:49 1120 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'ao756-bin.000002' position 401879515

2024-02-01 13:04:49 1118 [Note] Error reading relay log event: slave SQL thread was killed

2024-02-01 13:04:49 1119 [ERROR] Slave (additional info): Commit failed due to failure of an earlier commit on which this one depends Error_code: 1964

2024-02-01 13:04:49 1119 [Warning] Slave: Connection was killed Error_code: 1927

2024-02-01 13:04:49 1119 [Warning] Slave: Connection was killed Error_code: 1927

2024-02-01 13:04:49 1119 [Warning] Slave: Deadlock found when trying to get lock; try restarting transaction Error_code: 1213

2024-02-01 13:04:49 1119 [Warning] Slave: Commit failed due to failure of an earlier commit on which this one depends Error_code: 1964

2024-02-01 13:04:49 1119 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'ao756-bin.000002' position 401879515

2024-02-01 13:04:49 1121 [ERROR] Slave (additional info): Commit failed due to failure of an earlier commit on which this one depends Error_code: 1964

2024-02-01 13:04:49 1121 [Warning] Slave: Connection was killed Error_code: 1927

2024-02-01 13:04:49 1121 [Warning] Slave: Connection was killed Error_code: 1927

2024-02-01 13:04:49 1121 [Warning] Slave: Deadlock found when trying to get lock; try restarting transaction Error_code: 1213

2024-02-01 13:04:49 1121 [Warning] Slave: Commit failed due to failure of an earlier commit on which this one depends Error_code: 1964

2024-02-01 13:04:49 1121 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'ao756-bin.000002' position 401879515

2024-02-01 13:04:49 1122 [ERROR] InnoDB: We detected index corruption in an InnoDB type table. You have to dump + drop + reimport the table or, in a case of widespread corruption, dump all InnoDB tables and recreate the whole tablespace. If the mariadbd server crashes after the startup or when you dump the tables. Please refer to https://mariadb.com/kb/en/library/innodb-recovery-modes/ for information about forcing recovery.

2024-02-01 13:04:49 1122 [ERROR] mariadbd: Index for table 'tts' is corrupt; try to repair it

2024-02-01 13:04:49 1118 [Note] Slave SQL thread exiting, replication stopped in log 'ao756-bin.000002' at position 401879515, master: 192.168.1.19:3306

The table is OK on primary, but CHECK TABLE on replica reports corruption(s):

openxs@ao756:~/dbs/maria10.6$ bin/mysql --socket=/tmp/node1.sock test -e 'check table tts';

+----------+-------+----------+----------+

| Table    | Op    | Msg_type | Msg_text |

+----------+-------+----------+----------+

| test.tts | check | status   | OK       |

+----------+-------+----------+----------+

openxs@ao756:~/dbs/maria10.6$ bin/mysql --socket=/tmp/node2.sock test -e 'check table tts';

+----------+-------+----------+-----------------------------------------------------+

| Table    | Op    | Msg_type | Msg_text                                            |

+----------+-------+----------+-----------------------------------------------------+

| test.tts | check | Warning  | InnoDB: Index 'c4' contains 3 entries, should be 1. |

| test.tts | check | error    | Corrupt                                             |

+----------+-------+----------+-----------------------------------------------------+

in one of indexes that involve column(s) that we change (indirectly) by the script.

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duplicates

MDEV-33351 Corruption of indexes on generated virtual column(s) on an optimistic parallel replica

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Assignee:: Unassigned

Reporter:: Valerii Kravchuk

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Dates

Created:: 2024-02-01 11:32

Updated:: 2024-02-07 16:09

Resolved:: 2024-02-01 12:32

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